There are a few factors that have been known to change when it comes to Google snippets. Each of these features consists of:

Pixel limit: While there are general pixel constraints that SEO practitioners adhere to (sometimes condensed to just "characters"), the amount of text that can display within a title tag or meta description can vary significantly depending on the type of device. Google occasionally changes the maximum allowed pixel size for each meta data entry like title tags. This particular modification has been more apparent in recent years. Despite our best attempts to create a title and description that accurately describes a page, Google will probably still change the snippet depending on the query.

The query itself may have the greatest impact; a recent study found that meta descriptions were rewritten in about 70% of cases. Complete replacement: In this case, Google will totally change the snippet because it does not accurately reflect the material as it appears on the page. This is one of the major effects I'll be examining in this essay, and I'll go into it more in a moment. The biggest shift I can recall in recent years has to do with the meta description's pixel restriction. In May 2018, when Google drastically shortened the meta descriptions for some queries.